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1.
The tempo marking for a really fucking fast piece of music.
My god thats waaay faster than walking speed, it must be allegro!
by fair is fair December 23, 2010
 
2.
Its sole purpose is to rhyme with the word "negro."
Turell: I wrote a poem bro!
Freedom: Let's hear it yo!
Turell: This poem's in allegro.

My skin's like a negro.
by Phattysents May 04, 2011
 
3.
The Austin Allegro was a car built by British Leyland between strikes and the year 1973-82. These cars were alright for their time but the poor build quality and the ill-concieved design at times is what did for these cars and gave them their bad reputation. By the time the Allegro S3 came along in 1979 it had been largely redeveloped into what it should have been when launched 6 years previously. Typical british really, a good idea blighted by shite workforces and bad design.
The Allegro, another word for lively and a car by BL
by A soppy old duffer October 28, 2005
 
4.
1) Probably the world's worst car of all time. Pure British craftsmanship of the late 1970s.
2) Generic heap of junk.
Goddammit, another hole has rusted into my Allegro.
by nvdw May 02, 2005