Synonyms for Irregular:
Formal:
* Unconventional: Deviating from what is standard or customary.
* Nonconformist: Not conforming to accepted standards or practices.
* Atypical: Not typical or usual.
* Aberrant: Deviating from the normal or expected.
* Anomalous: Deviating from what is standard, normal, or expected.
* Unsystematic: Lacking a regular or organized pattern.
* Haphazard: Lacking any plan, order, or direction.
* Sporadic: Occurring at irregular intervals.
* Erratic: Not regular or consistent; unpredictable.
Informal:
* Offbeat: Unconventional and unusual.
* Unorthodox: Not conforming to accepted standards.
* Out of whack: Not functioning properly or in a normal way.
* Jumpy: Unpredictable or erratic.
* Wobbly: Unstable or unsteady.
Synonyms for Crude:
Formal:
* Rough: Not smooth or refined.
* Unrefined: Not processed or polished.
* Uncultivated: Not developed or refined.
* Primitive: Simple and basic; not advanced.
* Coarse: Rough or unrefined in texture or appearance.
* Vulgar: Offensive in language or behavior.
* Boorish: Rude and insensitive.
* Unpolished: Lacking refinement or sophistication.
* Gauche: Awkward and clumsy.
Informal:
* Tacky: In poor taste or lacking refinement.
* Cheesy: Cheap and in poor taste.
* Trashy: Cheap and lacking quality.
* Uncouth: Rude and unrefined.
* Crass: Crude and insensitive.
* Slobbering: Excessively enthusiastic or emotional, often in a crude way.
* Blatant: Obvious and offensive.
The best synonym for you will depend on the specific context and the desired tone.