on the blob 

When a girl is on the blob, that means she has her period.

Dis bitch's a lil' bitchy, I fuckin' think she's on da blob.

on the blob by Fangsta March 17, 2003

On the blob 

A red alcoholic cocktail containing vodka, peach schnapps, cordial and raspberry served in a pint glass and red stained tissue in substitute for an umbrella. Contains the weekly recommended allowance of alcohol and sugar for a grown man in one week and may give you the shits the following day.

"I'm on the blob tonight"

On the blob by Mr BlobbyBlob December 28, 2011

on the blob 

A crude expression for a female on her period used by immature boys who don't realise that a female is stressed when she is not on her period (hence the term PMS - PRE menstrual tension) thanks for reading.

"Naff off Dave."
"Oooh! Let me guess - you're on the blob!" Uh, no!

on the blob by MilitantAtheist December 4, 2003

NOTB: Not on the blob 

When a girl wears tight white trousers or a really short skirt on a night out she is definitely NOTB not on the blob (period)

Hey mate that girls so fit and she's definitely NOTB: not on the blob. Get stuck in boy

NOTB: Not on the blob by Wixo August 29, 2017