Could be...
A squid is the guy that blasts past you on the straightaway and then piles it up in the next corner, or doesn't attack the hill with enough effort and stalls just at the top right in front of you, or finds the deepest part of the creek crossing to get stuck in and then wants your help getting out, or screams profanitities to get by in the free zones just to sit on the side of the trail a half a mile later.
I know lots of squids..........On row one, I don't have to deal with 'em.