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Person who cannot have one night stands, after the night in question they must txt and fall in love with the person they slept with even if their rank.
Harvey;lads ive just txt thet rank mackem lass again.

The Lads; shut up you Love Muppet
by PMR July 10, 2004
A muppet in love. Most commonly used with reference to a member of the male gender. Describes a guy who has become entirely wrapped around a girl's finger in serf-like fashion, and as a result displays pathetic, incoherent, twat-like behaviour in all other areas of his puppeteered existence...and yet is regrettably oblivious to the fact.
"Ever since he started dating her, Paul's turned into a right love muppet"
by L. Awknad March 10, 2005