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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.
by Fangsta March 17, 2003
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"
by Mr BlobbyBlob December 25, 2011
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!
by MilitantAtheist December 04, 2003