crusty seagull Share definition Flag When you have sex on the beach, and the man gets sand into the woman's vagina and she goes 'AWKKHH!' like a seagull. Me n Jeff had sex on the beach last night, and he gave me a crusty seagull, the wanker. crusty seagull by redem17 September 25, 2013 0 0 Get merch Get the crusty seagull mug. Buy Now — $32.95 See more merch