Superlatively under weather
Illest is the superlative form of ill in its slang sense meaning cool, impressive, or excellent.
From hip-hop culture starting in the 1980s, where ill flipped from negative to positive—the sickest, most extreme version of something became the best: That was the illest freestyle I've ever heard.
Still carries street credibility when used unironically.
IDEA.org / Words / illest
Superlatively under weather
Illest is the superlative form of ill in its slang sense meaning cool, impressive, or excellent.
From hip-hop culture starting in the 1980s, where ill flipped from negative to positive—the sickest, most extreme version of something became the best: That was the illest freestyle I've ever heard.
Still carries street credibility when used unironically.
1. slang-excellent — dopest, Slang for best; sickest (Most severely afflicted); freshest (Least spoiled or worn); flyest (Most impressively cool); coolest · tightest · realest · baddest · rawest · hottest · fire · lit · dope · sick
HEALTH STATUSillest ≠ healthiest In peak physical condition; fittest · strongest · heartiest · soundest · well
COOLNESS/IMPRESSIVENESS (SLANG)illest ≠ lamest Superlatively unconvincing; corniest · weakest · squarest · dorkiest · nerdiest
ill, illness, sickness, unwell, sickly, ailing, ailment, illnesses, ailments
Word data: Linguabase (CC0) · www.idea.org/words/illest