Less than decent, or dec. It simply means "Less than ok." Sub meaning less than, and dec meaning ok. Can have things added on the end, such as "sub-dec as hell".

The use of sexual innuendo, making of indecent suggestions and sometimes minor physicall sexual harrassment (e.g. "accidental" touching or pinching). Typically perpetrated by male youths against a somewhat older women. An expression used widely on the Indian Sub-continent.

Sex organ of a Telugu male.

On account of their Negroid-Australoid descent, macrophallism is pronounced among Dravidoid Telugus.
Ethnographic & clinical measurements consistently confirm that the Telugu Penis, along with other variants of the Dravidian Penis, dwarfs the Indo-Aryan Penis & exceeds even the Nigerian Penis:

Ethnicity __ Group ___ L cm (in) __ Ref
Dravidian .. Shudra .. 24.13 (9.50) a
Dravidian .. Telugu .. 14.00 (5.51) b
Dravidian .. Malabari. 13.01 (5.12) c
Sudanoid ... Nigerian. 12.30 (4.84) d
Iranian .... Persian . 11.58 (4.56) e
Indo-Aryan . Hindi ... 11.49 (4.52) f
C European . Alpine .. 10.83 (4.26) g

a A Edwardes 'The Jewel in the Lotus' NY: Julian Press, 1959: 60
b S Krishnamurti. 'Multi-Ethnic Indian Penis Size Study' in: '11th Biennial Meetg of the Asia Pac Soc for Sexual Med
Oct 6-10, 2007, Jeju, Korea' J Sexual Med v5 sup5 (Dec 2008) 197-258.
c K Promodu et al 'Penile l. & circ.: an Indian study' Int J Impot Res 19.6 (2007): 558-563
d ML Ajmani et al 'Anthropometric study of male ext. genitalia of 320 healthy Nigerians' Anthro Anzeiger 43.2
(1985): 179-186
e D Mehraban et al 'Penile size & somatomet...