When a guy spanks or slaps another person with semen on his hand - i.e. just after masturbating.
This is a generally condescending move on par with tea-bagging, and - if executed properly - causes considerable distress on the recipient's end. Do not attempt this on someone that is physically stronger than you because they will perceive it as a sign of great disrespect.
"John was being a real douche last night, so I jerked it to a picture of his girlfriend and then spunked him in his sleep."
"Dude, knock it off or I'll spunk you."
to waste or lose something ie money
i just spunked all my money on the fruit machines
When a user of a forum responds to an obscure spam message thinking it is a legitimate message.
Post 1: Can someone give me the ingredients for apple pie?
Post 2 (spam): I don't know her, can you give me more details? -usually with a linked signature
Post 3: Know who? The person that made the apple pie?
The author of Post 3 got Spunked