Know why cattywampus was trending last week?
considered a playful elaboration since its re-birth in 1843, but it was a perfectly good 15c. word, from Medieval Latin splendorifer, from splendor (see splendor) + ferre "to bear" (see infer).
A slap or smack (1958+)
To hit with a smacking sound; slap: I wouldn't be at all concerned that a tomato would splat me in the face (1922+)