" 'worshipping God with our bodies'
Never heard this before🤔how does one do that? In Hinduism, some people believe that yoga can be an act of worship but I've never heard this in regards to church and the clothes people wear and I go all the time."
It's a mainstream idea in Catholic theology, don't know about other denomininations.
In Catholic theology, humans are composite beings, spiritual animals: we have a body and a rational soul. We are not spiritual beings trapped inside a shell. So our whole being, body and soul, is involved in worship. Ideally the intellect and will should guide the lower powers, but it is also the case that my body can lead me to pray when my mind is distracted. This is why we use different physical gestures in prayer (kneeling, prostration, hands raised in praise ...), it is also why Catholics use physical objects (e.g. rosary beads) and things that appeal to the senses (incense, music ...). Not the only reason these are used, but part of it.
Saint Paul tells us that we are to glorify God with our bodies. For Catholics at least this includes clothing choices.
" 'and making ourselves conspicuous by dressing abnormally on the other hand.'
What is dressing "abnormally"? Do you mean dressing as a punk for example?"
Personally, I mean dressing in a way that draws attention away from God and towards me. There are churches where dressing as a punk (as long as there were no anti-religious slogans or profanity on clothes) would be unremarkable, and churches where it would just distract others. If other people want to come to church in punk clothes, they would be very welcome, but it wouldn't be what I would choose to wear. I don't think this is particularly controversial. For example, I own a nice white dress; I wouldn't wear it to someone else's wedding.