When you defecate the bed profusely to where it's overflowing.
Dude, I was so sick I ended up brown boating my girlfriends bed.
(SPOILERS FOR RDR2)
In one of the endings for Red Dead Redemption 2 (Specifically helping John with Low Honor) Arthur gets into a fight and is eventually shot by a former member of the gang, Micah. During this sequence, Micah will say *Damn you!" and Arthur will reply with *Damn us both!". The way Arthur says "Damn us both" sounds like "Tennis Boat" which eventually became a meme.
Micah: "You're not better than me, Morgan!"
Arthur: "Whatever you say, you fool!"
Micah: "Damn you!"
Arthur: "TENNIS BOAT!"
*Arthur dies*
1. Internet Rapper and superstar under the sheets. Legend has it he is a subway thicc inside his trousers.
2. A boat that hasnt reached full maturity.
Jung Boat is a cool guy
Jung Boat is my spirit animal
Woah, Jung Boat has a massive wanger
And the Oscar goes toooo...... Jung Boat
Lil Yachty aka Lil Boat aka Darnell Boat
Lil Boat, Darnell Boat here
One person stands still while the other pshysicaly moves them around to there liking
Before a Family Portrate
Photographer: Everyone gather over there and ill Tug-Boat You into position
Family (mumbles): Ok
A boat full of loco (Boat Loc) or crazy as FUCK.
This mothafucka is boat loc!