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abbreviation for "Potential to Blow Up ratio", which is a scale ranging from 1 (low) to 10 (high), that rates the chances a currently hot girl will someday gain weight and become overly chubby and unattractive.

Key note: One night hookups are exempt from the P.T.B.U ratio as the girl being rated is usually hot, and even though she is likely to blow up in the future, the aforementioned potential blow up will not effect her current hotness.
Tom: "Check out that chick over there... she is smoking hot."

Brent: "Dude, look her thick upper arms and those kankles, she's got a high P.T.B.U. ratio.

Tom: "Man, who says I'm proposing? Bang it tonight, leave it tomorrow.
by Jack Metzler April 02, 2008
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Apr 22 Word of the Day
When you eat dirt for the first time and leave your family to build a shack in the woods
Bro since I got dirtpilled on Tuesday I have made sooo many worm friends and made them soo many little houses to get married in. Me? Lonely? No you’re the lonely one u lawn owning freak
via giphy
by ecogoth December 30, 2020
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2
abbreviation for "Potential to Blow Up ratio", which is a scale ranging from 1 (low) to 10 (high), that rates the chances a currently hot girl will someday gain weight and become overly chubby and unattractive.

Key note: One night hookups are exempt from the P.T.B.U ratio as the girl being rated is usually hot, and even though she is likely to blow up in the future, the aforementioned potential blow up will not effect her current hotness.
Tom: "Check out that chick over there... she is smoking hot."

Brent: "Dude, look her thick upper arms and those kankles, she's got a high P.T.B.U. ratio.

Tom: "Man, who says I'm proposing? Bang it tonight, leave it tomorrow.
by Jack Metzler April 02, 2008
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