I've never called my self an avid anything, nor I have I heard any person I've cycled with use it to describe their cycling. The only time I've heard the term 'avid' to describe one's biking was in this exchange I had with a motorist who honked at me and closed passed me several times in the same location on the way to work:

me: excuse me.
mot: yes
me: did you know you almost hit me coming down rural road?
mot: no i did not
me: i am positive because you honked at me before you passed me
mot: only cause I don't wanna to hit you
me: you should move over to the other lane
mot: should you be in the middle like a car?
me: yes I should because I shouldn't be in the right turn lane, because I'm not turning right
mot: its, that's not a right turn lane
me: yes it is
mot: its all
me: no it isn't, i ride down there every day
mot: well you shouldn't be in the middle of the road 'cause you will get hit
me: no I won't, your the only person, you've done this to me three times
mot: no you, i have not
me: yes you have
mot: that's the first time I've ever seen you on a bike in the middle of the road
me: tell ya what I'm gonna call the police because you passed me closer than three feet, I've a video camera here so I have evidence of it
mot: i don't care about your video camera
me: i know you don't but it's some, you've got to look out for people, you know
mot: i do look out for people
me: no you don't
mot: i certainly don't want to hit a biker and have that on my conscious
me: then why don't you move over, there was no other cars
mot: you know i am an avid bike rider I know how to ride a bike
me: i...
mot: obviously you think you are an automobile and belong in the middle of the lane
me: no, i ride in the safest position on the road
mot: you ride like you own the road
me: no, you, come on you had a whole left lane open to you
mot: well i'm turning right, i don't need the left lane
me: then you can go around me you can easily done that
mot: I did go around you, you don't think i went around you
me: no you went right in the same lane as I was
mot: i'm in my lane
me: then move over to the other lane
mot: why?
me: because it is the proper thing do to you give people three feet clearance, it's state law, you pass a cyclist with three foot clearance
mot: if you've got a bike lane,
me: no i do not,
mot: and i miss you..
me: not on that road i do not
mot: you do up until this point [gestures to areas where close pass occurred] and..
me: right in which case...
mot: then there's stripe-ed, there striped lines
me: in which case I do not ride in the right turn lane
mot: come on
me: please look out for people
mot: i do look out, i've been driving for 53 years
me: well maybe you could take a refresher course
mot: and i think you should too