To soup up something such as a car engine means to make it more powerful. To soup up something such as a piece of music or writing means to make it more interesting and exciting.
...his String Quartet finale, souped up for massed strings. [VERBPARTICLE noun (not pronoun)]
souped-upadjective [ADJECTIVE noun]
...a souped-up Peugeot 205.
...a souped-up version of tennis.
See full dictionary entry for soup
soup up in British English
informal
verb(tr, adverb)
1.
to modify (a vehicle or vehicle engine) in order to increase its power
2. Also: hot up or (esp US and Canadian) hop up
to make (something) more exciting or interesting
adjectivesouped-up
3.
(of a vehicle or vehicle engine) modified so as to be more powerful
a souped-up scooter
4.
more exciting or interesting
a souped-up version of their last single
soup up in American English
Slang
to increase the power, capacity for speed, etc. of (an engine, etc.)
See full dictionary entry for soup
Examples of 'soup up' in a sentence
soup up
It would soup up my socialising no end if it could be kept secret.