A cocolink is a useless image posted by a user in an IRC channel. This link is usually pointless and is made just to waste your time.
(13:06:43) C-o-c-o-9-3: LOL I ags speced this lvl 90 and hit a fuckin 53, lmfao im such an ownage hybrid
(13:07:27) `Marty: !kb C-o-c-o-9-3 idiot stop with the gay cocolinks
(13:07:27) * Captain_Falcon sets mode: +b *!*@Swift-2FA6ACB9.dhcp.slid.la.charter.com
(13:07:27) * C-o-c-o-9-3 was kicked by Captain_Falcon (idiot stop with the gay cocolinks)