guaca guaca Share definition Flag When a girl is suckin ur dick and she tries to deepthroat but she cant go all the way so her throat makes a "guaca guaca" sound "man that girl tried to deepthroat but all i heard was guaca guaca" guaca guaca by Zimmy098 April 27, 2006 0 0 Get merch Get the guaca guaca mug. Buy Now — $32.95 See more merch