invertibral
(adj.) When someone folds
like a lawn chair under even mild pressure. Lacking spine, structure, or self-
respect. Pretends to have principles but can’
t hold a line if their life depended on it.
Examples:
“He went all invertibral the second she raised her voice.”
“Their whole response was invertibral—word
salad with no guts.”
“Classic invertibral move: apologize without meaning it and blame someone else.”
"The invertibral waiter gave the intolerable patron a hand
job under the table, he found it impossible to challenge a harsh demand"
See also: spineless, weak-willed, bootlicker.