Co-Ca-Che-Lunk is an American student song. Lyrics and music in Carmina Princetonia and also in Levy Sheet Music, pub. 1855. See thread 44108 for link and note by Masato. The tune is quite different from 'Comin' thro' the rye,' although it is supposed to be based on an Irish fiddle tune.
44108: Co-Ca-Che-Lunk