So yeah.. I started playing aikido about last week and sometimes people were like lol shovel nub
Well can anyone explain me what exactly it is so I don't use it?

So only that particular move is called a shovel or like every move that throws the opponent out of the ring? Because that's what people were accusing me of...

A shovel has never officialy been given a definition, but most people refer it to "lower arms at first turn, then push".

Shovels for some people is, like Craved said, a beginners move or annoying move. Annoying moves can be for example where you lowgrab your opponent to get pushpower on him. It is indeed possible to counter lowgrabs, but it requires another sort of skill than normal suplex.

A kick is also a move that some people classifies as annoying because mostly kicks are meant to lift out the opponent rather than countering him.

Overthrows are for me, a good example of a skillful moves because you move your opponent over yourself and try to dq him on the side that is behind you rather than trying to lift/push him out of the side he is at. To make a overthrow you first need to come close to the opponent and manage to pull him out of balance. Chest and glutes are often good to use when trying to do overthrows.

The least nooby thing in my opinion, must be counters, as long as you don't lift your opponent high up in the sky when countering.

Another way to find out what a shovel is, is to lift your opponent up in the first few turns and start pushing him outside the dojo. If they start raging and flaming you shouting things in caps like "YOU F*%K#@G NOOB SHOVELER" then it is considered a shovel. Alternatively they might just quit before they lose.

Some people have also tried to give advice on how to counter it. The best way, this you wont see done a lot, is simply to lean back if you see them using a shovel like opener. By leaning back, when your opponent tries to push you, they will push themselves off the ground and you will lift them. In Some cases this can even reverse a shovel.