adjective / noun
(adjective) neither parallel nor at right angles; slanted; not expressed in a direct way; not straightforward or honest
(noun) a line or direction that is not parallel or perpendicular to another line or surface; a line or line segment that forms an angle other than 90 degrees with the x-axis
To go Ob-lique, you have to LIQUE- (lick) your way around a corner, not going straight on, but at an angle.