"like a ram," in any sense, c. 1600, from ram (n.) + -y (2). Related: Ramminess. Compare Middle English rammish (late 14c.), of smells, "rank, offensive."
Entries linking to rammy
ram n.
Old English ramm "male sheep," also "battering ram, instrument for crushing or driving by impact," and the zodiac sign; earlier rom "male sheep," a West Germanic word (cognates: Middle Low German, Middle Dutch, Dutch, Old High German ram), of unknown origin. Perhaps [Klein] connected with Old Norse rammr "strong," Old Church Slavonic ramenu "impetuous, violent."
-y 2
adjective suffix, "full of or characterized by," from Old English -ig, from Proto-Germanic *-iga- (source also of Dutch, Danish, German -ig, Gothic -egs), from PIE -(i)ko-, adjectival suffix, cognate with elements in Greek -ikos, Latin -icus (see -ic). Originally added to nouns in Old English; used from 13c. with verbs, and by 15c. even with other adjectives (for example crispy). Adjectives such as hugy, vasty are artificial words that exist for the sake of poetical metrics.