Hand Mustard Share definition Flag A term for semen, used in the context of masturbation or manual intercourse. "Awww naw gurl. You done be jerkin' me off and I skeeted a load o' hand mustard on yo grill. Sorry fo dat." Hand Mustard by Alex and Rob April 4, 2006 0 0 Get merch Get the Hand Mustard mug. Buy Now — $32.95 See more merch