What is "mind rhyme"

n. A form of rhyme in which a rhyming word is omitted, and left to be (term: heard) only in the reader's mind

Mind rhyme is the suggestion of a rhyme which is left unsaid and must be inferred by the listener. Mind rhyme may be achieved either by stopping short, or by replacing the expected word with another (which may have the same rhyme or not). Teasing rhyme is the use of mind rhyme as a form of innuendo, where the unsaid word is taboo or completes a sentence indelicately.

An example, in the context of cheerleading:

Mind rhyme is often a form of word play. The implied rhyme is inferable only from the context. This contrasts with rhyming slang from which the rhyming portion has been clipped, which is part of the lexicon. (An example is dogs, meaning "feet", a clipping of rhyming dog's meat.)