That Looks About Right.
Pronounced "tee-lar". An acronym used in skilled trades when exact measurements are not considered necessary to accomplish the task at hand. Well, we hope they aren't necessary.
Reference: one airline mechanic whose name shall be withheld for reasons of privacy and possible liability.
TLAR is a semantic companion to SWAG, guesstimate and eye-ball (the verb form "to eye-ball").
The use of TLAR is companionable to SNAFU, FUBAR, PUBAR, and PYHBYK&KYAG.
Advantage: it sounds like a measuring tool. "Oh, sure it's straight. We TLAR'ed it."