[david-given]

As an counter datapoint, this is the first time I have ever heard of this.

[TazeTSchnitzel]

Perhaps as "umph" or "umf"? No?

[david-given]

No, not even slightly.

FWIW, I grew up in Scotland, then moved to England, so I'm probably from a rather different cultural background than the poster.

[iagooar]

As a non-native speaker, I have seen "umph" before.