While receiving a blow job, the action of finishing and dropping your load in the person's face and yelling "SWEET" followed by a cock slap and shouting "SOUR"
Jeremy: So I gave this girl some sweet and sour sauce last night
Chad: Wait you ordered Chinese food?
Jeremy: not exactly...
Guy: *while performing the action* SWEET.... AND SOUR
Girl: Ew, that wasn't sweet at all!
Prices shown in USD.