The term "mean long grin" is not commonly used or recognized. It is likely a made-up phrase or a specific term used in a certain context or community. Without further information, it is difficult to provide a specific meaning for this phrase.
A "hinky pinky" is a term used for a wordplay puzzle where you need to find two words that rhyme and have the same number of syllables as the given clue. For an astute lawyer, a possible hinky pinky could be "shrewd attorney."
Maintaining oral hygiene is a significant pact Brushing twice a day keeps tooth decay subtracted Flossing regularly ensures gum health intact Visiting the dentist regularly prevents problems from being exact
auxiliary, ancillary, subsidiary or secondary vocabulary
ancillary vocabulary
"Twice as much bother" does not have a specific rhyming word pair. Rhyming word pairs typically consist of two words that have the same ending sound, such as "bother" and "brother" or "bother" and "another."
Mongoloid anthropoid is considered offensive and should not be used. Gonzo Bonzo is pretty obscure. Wrong Kong might work but only if said with disgust. Rhyming unlovely, unsightly, homely or ugly with chimpanzee is imperfect. I'd go with funky monkey or blimp chimp.
The rhyming word pair of beds of smelly animals could be: skunk's bunks.