1 an unpleasantly dirty or messy substance.
2 nonsense; rubbish.
a. a deposit or coating of refuse or of an impure or alien substance; muck.
b. a filthy, repulsive, or contemptible person.
c. something that is worthless, objectionable, or contemptible.
d. prevarication, exaggeration, or flattery.
e. a non specific, imaginary, or vaguely defined disease or disorder of the body: jungle crud.
f. any unpleasant external ailment, disorder, or the like, as a skin rash.
g. venereal disease, especially syphilis.
h. Vulgar. dried semen.
Crud left flying in the wind
To attach itself to grass or trees.