We found one dictionary that defines the word grammatically challenged:

Slang (1 matching dictionary)

1. Grammatically Challenged: Urban Dictionary

▸ Words similar to grammatically challenged ▸ Usage examples for grammatically challenged ▸ Idioms related to grammatically challenged ▸ Wikipedia articles (New!) ▸ Words that often appear near grammatically challenged ▸ Rhymes of grammatically challenged ▸ Invented words related to grammatically challenged