An angry seagull is a sexual term, it refers to the act of hiding in a cupboard or other item of furnishings and viewing a couple engageing in an act of passion i.e. fucking eachother senseless, this is common when a husband is spying on his wife while shes having sex with someone else, the act may be commited whilst sipping a refreshing beverage, whilst watching the dirty pervert will toss ones self off (for our American readers, Jerk ones self off) and Jizz into ones hand, he will then proceed to break free off his hiding place and run at the couple doing the dirty yelling caaaa caaaa, like a seagull, and waving ones arms in a windmill effect, also similiar to a seagull, this will mean ones love potion is flung over the horny couple rendering them both disgruntled and embarresed.
"I bust a naughty all over your mommas face last night ciril", "I know Germentrude i was watching from a wardrobe, i was planning to commit the Angry seagul but unfortunately i didnt make a sexy explosion in time", "Oh what a dreadful shame my good man, well better luck next time", "Why thankyou my dear friend i will practice more for next time"
by Muhammed Legend June 16, 2007
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When you are screwing a girl on a beach, you take your penis out, dip it in the sand, then stick it back in her.
During springbreak, i did the angry seagull to this drunk chick...she didnt like it.
by NaMdiZzLe May 8, 2006
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An act in which a firefighter (typically of the North American coastal variety) deliberately soils his class “B” uniform shirt with a white substance of some kind, eg. cake frosting or penile ejaculate.

This disgruntled act of passive aggressive behavior is typically displayed at morning briefing and in response to a superior officer’s request to don the appropriate uniform attire when the overworked employee returns to the station after responding to a deluge of medical aids.
“Looks like Joe was up all night on the box again, he looks exhausted”

“Yeah, the chief must have given him crap about the uniform shirt policy and he just did the angry seagull....what a badass”
by Hoseman August 2, 2019
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Getting 2 foot kicked in the back of the head and then shat on
Had a right goer last night pal, she wanted the Angry seagull
by jaffajake July 26, 2022
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