Толковый словарь английского языка Oxford English Reference - slantwise adv. aslant.

slap v., n., & adv. --v. (slapped, slapping) 1 tr. & intr. strike with the palm of the hand or a flat object, or so as to make a similar noise. 2 tr. lay forcefully (slapped the money on the table; slapped a writ on the offender). 3 tr. put hastily or carelessly (slap some paint on the walls). 4 tr. (often foll. by down) colloq. reprimand or snub. --n. 1 a blow with the palm of the hand or a flat object. 2 a slapping sound. --adv. 1 with the suddenness or effectiveness or true aim of a blow, suddenly, fully, directly (ran slap into him; hit me slap in the eye). 2 = slap-bang. Phrases and idioms slap and tickle Brit. colloq. light-hearted amorous amusement. slap-bang violently, noisily, headlong. slap-happy colloq. 1 cheerfully casual or flippant. 2 punch-drunk. slap in the face a rebuff or affront. slap on the back n. congratulations. --v.tr. congratulate. slap-up esp. Brit. colloq. excellent, lavish; done regardless of expense (slap-up meal). Etymology: LG slapp (imit.)