Got tired of losing my train of thought every time I hit a phrase I didn't know. Doing DD and cmd+tab to google or CC to look something up, read the answer, cmd+tab back — where was I? Deep in CC? now I'm either scrolling down to ask a throwaway question and losing my place, or wasting my screenspace in another CC for a one-line answer. Spent an hour building wutmean — double-click a word, double-tap F1, instant explanation popup. esc to dismiss. Never leave what you're doing. open source, macOS, bring your own API key brew tap jasonfdg/tap brew install --cask wutmean PS: Similar tools exist — they're either too slow, try to do ten things at once, bury you in UI you didn't ask for, don't actually use AI, or only work in a browser. I just wanted a two-second answer anywhere on my screen.